霜棘：冰棘绕身，碰你的都冻一步

 fx-frostthorn

-- @file FrostThorn.lua
-- 霜棘 —— 冰棘绕身，碰你的都冻一步

local FrostThorn = {}

local CONST = {
    THORN_LIFE   = 8.0,
    THORN_CD     = 9.0,
    STUN_DUR     = 0.8,
    THORN_DMG    = 6,
    THORN_RANGE  = 30,

    COLOR_THORN  = "#8ec8e8",
    COLOR_DEEP   = "#1a4a6e",
    COLOR_GHOST  = "#d8f0fa",

    ZORDER_THORN = 128,
    ZORDER_FX    = 135,
    AUTOINC_BASE = 971000,
}

local _thornT   = 0
local _cdLeft   = 0
local _myStun   = 0
local _foeStun  = 0
local _scheduler = nil
local _autoInc  = 0

local function GenID(prefix)
    _autoInc = _autoInc + 1
    return string.format("%s_%d", prefix or "FTN",
        CONST.AUTOINC_BASE + _autoInc)
end

local function GetActorPos(id)
    if not id then return nil end
    local x = SL:GetValue("ACTOR_POSITION_X", id)
    local y = SL:GetValue("ACTOR_POSITION_Y", id)
    if not x or not y then return nil end
    return { x = x, y = y }
end

local function SafeRemove(node)
    if node and not GUI:Widget_IsNull(node) then
        GUI:removeFromParent(node)
    end
end

local function ShowTip(msg)
    if msg and msg ~= "" then SL:ShowSystemTips(msg) end
end

-- 冰棘入口
function FrostThorn.Cast()
    if _cdLeft > 0 or _thornT > 0 then return end
    _cdLeft = CONST.THORN_CD
    _thornT = CONST.THORN_LIFE
    ShowTip("冰棘绕了——八秒，它近身就冻")
end

-- 双方攻击出口：冰棘距离判定
local function CheckThorn(attacker, target)
    if _thornT <= 0 then return end
    local ap = GetActorPos(attacker)
    local tpp = GetActorPos(target)
    if not ap or not tpp then return end
    if math.abs(ap.x - tpp.x) <= CONST.THORN_RANGE then
        if attacker == SL:GetValue("USER_ID") then
            _myStun = CONST.STUN_DUR
            SL:ActorHurt(target, CONST.THORN_DMG)
        else
            _foeStun = CONST.STUN_DUR
            SL:ActorHurt(attacker, CONST.THORN_DMG)
        end
    end
end

if not _scheduler then
    _scheduler = SL:Schedule(function(dt)
        _cdLeft = math.max(0, _cdLeft - dt)
        if _thornT > 0 then
            _thornT = _thornT - dt
            if _thornT <= 0 then
                ShowTip("棘化了——下一圈跟上")
            end
        end
        if _myStun > 0 then
            _myStun = math.max(0, _myStun - dt)
        end
        if _foeStun > 0 then
            _foeStun = math.max(0, _foeStun - dt)
        end
    end, 0.02)
end

SL:ScheduleOnce(function()
    ShowTip("技能已加载: 霜棘 (调试按钮触发)")
end, 1.0)

return FrostThorn